Fire-extinguishing composition



Patented @ct. 3, i922.

EABQME EARL ALBERT LOUDER, OF NEW YORK, N. Y., ASSIGNOR T BOYCE & VEEDER, OF

LONG ISLAND CITY, NEW YORK, A GOPARTNER-SHIP COMPOSED 0F HARRISON H. BOYCE AND PAUL L. VEEDER.

FIRE-EXTINGUISHING COMPOSITION.

No Drawing.

To all whom it may concern:

Be it known that I, EARL ALBERT LoUDE-R,

a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Fire-Extinguishing Composition, of which the following is a specification.

This. invention relates to liquids for use in extinguishing fires and especially to a liquid which, besides possessing effective fire extinguishing qualities shall have a very low freezing point; shall not be harmful to fabrics or other substances Which may be exposed to its action; and the fumes from which when used in extinguishing a fire shall be non-poisonous and as inoffensive as possible. It is also important that the liquid shall be non-corrosive of the materials used in the fire extinguisher to such an extent at least to prevent deterioration thereof, and shall also be of such inexpensive nature that it may be economically employed for fire extinguishing purposes.

25 Carbon tetrachlorid is a liquid which has been employed extensively in fire extinguishers, and which has certain very desira ble properties, especially in forming a thick blanket of gas or vapor over the fire which is a non-supporter of combustion, and therefore quickly smothers the flames. Carbon tetrachlorid, however, does not have as lOW a freezing point as is desirable for use in cold climates, and furthermore not only is the odor of the liquid unpleasant but the fumes which are given off when the liquid is applied to a fire are very disagreeable.

I have found that by mixing a proportion of carbon bisulfid with carbon tetrachlorid a very much improved fire extinguishing liquid is produced. Carbon bisulfid has a Serial No. 339,421.

very low freezing point, and I have found that by adding a comparatively small per centage thereof to the carbon tetrachlorid, the freezing point of the mixture is reduced very substantially below that of carbon tetrachlorid alone. Thus carbon tetrachlorid has a freezing point of about 19.5. C. while a mixture of carbon tetrachlorid with 10% of carbon bisulfid has a freezing point of about ---48 C. Smaller portions of carbon bisulfid will reduce the freezing point of the mixture considerably, although not to the figure indi-' cated. The carbon bisulfid does not impair the fire extinguishing properties of the mixture, and it seems to distinctly improve the odor of the liquid. The fumes produced when the mixed liquid is thrown on the fire are very much less objectionable than the fumes produced by carbon tetrachlorid alone.

The amount of carbon bisulfid used may be in any suitable proportion to the amount of carbon tetrachlorid. 10% is adequate for use in temperate regions, producing a lowering of the freezing point of the mixture to about -48 C. as above noted.

Having thus described my invention, I claim 1. A fire extinguishing substance containing carbon tetrachlorid and carbon bisulfid.

2. A fire extinguishing liquid comprising carbon tetrachlorid having carbon bisulfid mixed therewith, the proportion of carbon tetrachlorid being considerably greater than, that of the carbon bisulfid. I

3. A fire extinguishing liquid comprising carbon tetrachlorid having carbon bisulfid mixed therewith, the amount of carbon bisulfid bein .approximately 10% of carbon tetrachlori -EARL ALBERT LOUDER. 

